Everything You Need to Know about Narcissists, Psychopaths, and Abuse - click on this link: http://www.narcissistic-abuse.com/faq1.html
The narcissist says: "I live through others. I inhabit their memories of me. Bits and pieces of Sam are strewn across continents, among hundreds of casual acquaintances, friends, lovers, teachers, admirers, and despisers. I exist by reflection. This is the essence of Secondary Narcissistic Supply - the secure knowledge that I am replicated in the minds of many. I want to be remembered because without being remembered I am not. I need to be discussed because I have no being except as a topic of discussion. So, passive memory is not enough. I need to be actively reminded of my achievements, of my moments of glory, of past adulation. The constancy of these streams of memories smoothes the inevitable fluctuations in Primary Narcissistic Supply. In lean moments, when I am all but forgotten, or when I feel humiliated by the gap between my reality and my grandiosity - these memories of past grandeur, related to me by outside "observers" lift my spirits. It is the main function of people in my life: to tell me how great I am because of how great I was."
(From the book "Malignant Self-love: Narcissism Revisited" by Sam Vaknin - Click on this link to purchase the print book, or 16 e-books, or 3 DVDs with 16 hours of video lectures on narcissists, psychopaths, and abuse in relationships: http://www.narcissistic-abuse.com/thebook.html)